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	<div id="winchm_template_title">IG_GET_BUS_DATA</div>
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	<div id="winchm_template_content"><div id="mainSection"><p>The IG_GET_BUS_DATA <a href="#Bookmark1075"><b>Ioctl</b></a> operation reads data from a system bus and the IG_SET_BUS_DATA <b>Ioctl</b> operation writes data to a system bus.  When calling <b>Ioctl</b> with <i>IoctlType</i> set to IG_GET_BUS_DATA or IG_SET_BUS_DATA, <i>IpvData</i> should contain an instance of the BUSDATA structure.</p>
<pre class="syntax" xml:space="preserve"><code>typedef struct _GETSETBUSDATA {
    ULONG  BusDataType;
    ULONG  BusNumber;
    ULONG  SlotNumber;
    PVOID  Buffer;
    ULONG  Offset;
    ULONG  Length;
} BUSDATA, *PBUSDATA;</code></pre>
<h2><a id="Members"></a><a id="members"></a><a id="MEMBERS"></a>Members</h2>
<p></p>
<dl>
<dt><a id="BusDataType"></a><a id="busdatatype"></a><a id="BUSDATATYPE"></a><b>BusDataType</b></dt>
<dd>
<p>Specifies the bus data type to use.  For details of allowed values, see the documentation for the BUS_DATA_TYPE enumeration in the Platform SDK.</p>
</dd>
<dt><a id="BusNumber"></a><a id="busnumber"></a><a id="BUSNUMBER"></a><b>BusNumber</b></dt>
<dd>
<p>Specifies the system-assigned number of the bus.  This is usually zero, unless the system has more than one bus of the same bus data type.</p>
</dd>
<dt><a id="SlotNumber"></a><a id="slotnumber"></a><a id="SLOTNUMBER"></a><b>SlotNumber</b></dt>
<dd>
<p>Specifies the logical slot number on the bus.</p>
</dd>
<dt><a id="Buffer"></a><a id="buffer"></a><a id="BUFFER"></a><b>Buffer</b></dt>
<dd>
<p>Specifies the buffer that contains the memory to write to the bus, or to receive the memory that is read from the bus.</p>
<p>The size of <b>Buffer</b> must be at least the value of <b>Length</b>.</p>
</dd>
<dt><a id="Offset"></a><a id="offset"></a><a id="OFFSET"></a><b>Offset</b></dt>
<dd>
<p>Specifies the offset in the bus data to start reading from or writing to.</p>
</dd>
<dt><a id="Length"></a><a id="length"></a><a id="LENGTH"></a><b>Length</b></dt>
<dd>
<p>Specifies the number of bytes to read from or write to the bus when the <b>Ioctl</b> operation is called.  Upon returning, <b>Length</b> is set to the number of bytes actually read or written.</p>
</dd>
</dl>
<h2><a id="Return_Value"></a><a id="return_value"></a><a id="RETURN_VALUE"></a>Return Value</h2>
<p>If this <b>Ioctl</b> operation succeeds, the return value from <b>Ioctl</b> is <b>TRUE</b>; otherwise, it is <b>FALSE</b>.</p>
<h2>Remarks</h2>
<p>The parameters for the IG_GET_BUS_DATA and IG_SET_BUS_DATA <a href="#Bookmark1075"><b>Ioctl</b></a> operations are the members of the BUSDATA structure.</p>
<p>This operation is only available in kernel-mode debugging.</p>
<p>The properties of the data in the bus depends on the system, bus, and slot.</p>
<h2>Requirements</h2>
<table>
<tr>
<th width="30%">
<p>Header</p>
</th>
<td width="70%">
<dl>
<dt>Wdbgexts.h (include Wdbgexts.h or Dbgeng.h)</dt>
</dl>
</td>
</tr>
</table>
<h2><a id="see_also"></a>See also</h2>
<dl>
<dt><a href="#Bookmark1075"><b>Ioctl</b></a></dt></dl></div></div>	
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